实现公历转农历的类

本全程主要根据当前公历年来获取到中国农历年份:如目前公历如为2009/01/08 则输出为2009年1月8日 星期四 农历己丑(牛)年十二月十三

import java.text.SimpleDateFormat;
import java.util.Calendar;
import java.util.Date;
import java.util.GregorianCalendar;
import java.util.Locale;

public class ChinaDate {
private static SimpleDateFormat sdf = new SimpleDateFormat("yyyy年M月d日 EEEEE");

final private static long[] lunarInfo = new long[] { 0x04bd8, 0x04ae0,
0x0a570, 0x054d5, 0x0d260, 0x0d950, 0x16554, 0x056a0, 0x09ad0,
0x055d2, 0x04ae0, 0x0a5b6, 0x0a4d0, 0x0d250, 0x1d255, 0x0b540,
0x0d6a0, 0x0ada2, 0x095b0, 0x14977, 0x04970, 0x0a4b0, 0x0b4b5,
0x06a50, 0x06d40, 0x1ab54, 0x02b60, 0x09570, 0x052f2, 0x04970,
0x06566, 0x0d4a0, 0x0ea50, 0x06e95, 0x05ad0, 0x02b60, 0x186e3,
0x092e0, 0x1c8d7, 0x0c950, 0x0d4a0, 0x1d8a6, 0x0b550, 0x056a0,
0x1a5b4, 0x025d0, 0x092d0, 0x0d2b2, 0x0a950, 0x0b557, 0x06ca0,
0x0b550, 0x15355, 0x04da0, 0x0a5d0, 0x14573, 0x052d0, 0x0a9a8,
0x0e950, 0x06aa0, 0x0aea6, 0x0ab50, 0x04b60, 0x0aae4, 0x0a570,
0x05260, 0x0f263, 0x0d950, 0x05b57, 0x056a0, 0x096d0, 0x04dd5,
0x04ad0, 0x0a4d0, 0x0d4d4, 0x0d250, 0x0d558, 0x0b540, 0x0b5a0,
0x195a6, 0x095b0, 0x049b0, 0x0a974, 0x0a4b0, 0x0b27a, 0x06a50,
0x06d40, 0x0af46, 0x0ab60, 0x09570, 0x04af5, 0x04970, 0x064b0,
0x074a3, 0x0ea50, 0x06b58, 0x055c0, 0x0ab60, 0x096d5, 0x092e0,
0x0c960, 0x0d954, 0x0d4a0, 0x0da50, 0x07552, 0x056a0, 0x0abb7,
0x025d0, 0x092d0, 0x0cab5, 0x0a950, 0x0b4a0, 0x0baa4, 0x0ad50,
0x055d9, 0x04ba0, 0x0a5b0, 0x15176, 0x052b0, 0x0a930, 0x07954,
0x06aa0, 0x0ad50, 0x05b52, 0x04b60, 0x0a6e6, 0x0a4e0, 0x0d260,
0x0ea65, 0x0d530, 0x05aa0, 0x076a3, 0x096d0, 0x04bd7, 0x04ad0,
0x0a4d0, 0x1d0b6, 0x0d250, 0x0d520, 0x0dd45, 0x0b5a0, 0x056d0,
0x055b2, 0x049b0, 0x0a577, 0x0a4b0, 0x0aa50, 0x1b255, 0x06d20,
0x0ada0 };

final private static int[] year20 = new int[] { 1, 4, 1, 2, 1, 2, 1, 1, 2,1, 2, 1 };

final private static int[] year19 = new int[] { 0, 3, 0, 1, 0, 1, 0, 0, 1,0, 1, 0 };

final private static int[] year2000 = new int[] { 0, 3, 1, 2, 1, 2, 1, 1,2, 1, 2, 1 };

public final static String[] nStr1 = new String[] { "", "正", "二", "三", "四", "五", "六", "七", "八", "九", "十", "十一", "十二" };

private final static String[] Gan = new String[] { "甲", "乙", "丙", "丁", "戊","己", "庚", "辛", "壬", "癸" };

private final static String[] Zhi = new String[] { "子", "丑", "寅", "卯", "辰","巳", "午", "未", "申", "酉", "戌", "亥" };

private final static String[] Animals = new String[] { "鼠", "牛", "虎", "兔","龙", "蛇", "马", "羊", "猴", "鸡", "狗", "猪" };

private final static String[] solarTerm = new String[] { "小寒", "大寒", "立春", "雨水", "惊蛰", "春分", "清明", "谷雨", "立夏", "小满", "芒种", "夏至", "小暑", "大暑","立秋", "处暑", "白露", "秋分", "寒露", "霜降", "立冬", "小雪", "大雪", "冬至" };

private final static String[] sFtv = new String[] { "0101*元旦", "0214 情人节","0308 妇女节", "0312 植树节", "0315 消费者权益日", "0401 愚人节", "0501 劳动节", "0504 青年节", "0512 护士节", "0601 儿童节", "0701 建党节", "0801 建军节","0808 父亲节", "0909 逝世纪念", "0910 教师节", "0928 孔子诞辰", "1001*国庆节", "1006 老人节", "1024 联合国日", "1112 孙中山诞辰", "1220 澳门回归", "1225 圣诞节","1226 诞辰" };

private final static String[] lFtv = new String[] { "0101*农历春节","0115 元宵节", "0505 端午节", "0707 七夕情人节", "0815 中秋节", "0909 重阳节","1208 腊八节", "1224 小年", "0100*除夕" };

/**
* 传回农历 y年的总天数
*
* @param y
* @return
*/
final private static int lYearDays(int y) {
int i, sum = 348;
for (i = 0x8000; i > 0x8; i >>= 1) {
if ((lunarInfo[y - 1900] & i) != 0)
sum += 1;
}
return (sum + leapDays(y));
}

/**
* 传回农历 y年闰月的天数
*
* @param y
* @return
*/
final private static int leapDays(int y) {
if (leapMonth(y) != 0) {
if ((lunarInfo[y - 1900] & 0x10000) != 0)
return 30;
else
return 29;
} else
return 0;
}

/**
* 传回农历 y年闰哪个月 1-12 , 没闰传回 0
*
* @param y
* @return
*/
final private static int leapMonth(int y) {
return (int) (lunarInfo[y - 1900] & 0xf);
}

/**
* 传回农历 y年m月的总天数
*
* @param y
* @param m
* @return
*/
final private static int monthDays(int y, int m) {
if ((lunarInfo[y - 1900] & (0x10000 >> m)) == 0)
return 29;
else
return 30;
}

/**
* 传回农历 y年的生肖
*
* @param y
* @return
*/
final public static String AnimalsYear(int y) {
return Animals[(y - 4) % 12];
}

/**
* 传入 月日的offset 传回干支,0=甲子
*
* @param num
* @return
*/
final private static String cyclicalm(int num) {
return (Gan[num % 10] + Zhi[num % 12]);
}

/**
* 传入 offset 传回干支, 0=甲子
*
* @param y
* @return
*/
final public static String cyclical(int y) {
int num = y - 1900 + 36;
return (cyclicalm(num));
}
/**
* 传出y年m月d日对应的农历.year0 .month1 .day2 .yearCyl3 .monCyl4 .dayCyl5 .isLeap6
*
* @param y
* @param m
* @param d
* @return
*/
final public static long[] calElement(int y, int m, int d) {
long[] nongDate = new long[7];
int i = 0, temp = 0, leap = 0;
Date baseDate = new GregorianCalendar(0 + 1900, 0, 31).getTime();
Date objDate = new GregorianCalendar(y, m - 1, d).getTime();
long offset = (objDate.getTime() - baseDate.getTime()) / 86400000L;
nongDate[5] = offset + 40;
nongDate[4] = 14;

for (i = 1900; i < 2050 && offset > 0; i++) {
temp = lYearDays(i);
offset -= temp;
nongDate[4] += 12;
}
if (offset < 0) {
offset += temp;
i--;
nongDate[4] -= 12;
}
nongDate[0] = i;
nongDate[3] = i - 1864;
leap = leapMonth(i); // 闰哪个月
nongDate[6] = 0;

for (i = 1; i < 13 && offset > 0; i++) {
// 闰月
if (leap > 0 && i == (leap + 1) && nongDate[6] == 0) {
--i;
nongDate[6] = 1;
temp = leapDays((int) nongDate[0]);
} else {
temp = monthDays((int) nongDate[0], i);
}

// 解除闰月
if (nongDate[6] == 1 && i == (leap + 1))
nongDate[6] = 0;
offset -= temp;
if (nongDate[6] == 0)
nongDate[4]++;
}

if (offset == 0 && leap > 0 && i == leap + 1) {
if (nongDate[6] == 1) {
nongDate[6] = 0;
} else {
nongDate[6] = 1;
--i;
--nongDate[4];
}
}
if (offset < 0) {
offset += temp;
--i;
--nongDate[4];
}
nongDate[1] = i;
nongDate[2] = offset + 1;
return nongDate;
}

public final static String getChinaDate(int day) {
String a = "";
if (day == 10)
return "初十";
if (day == 20)
return "二十";
if (day == 30)
return "三十";
int two = (int) ((day) / 10);
if (two == 0)
a = "初";
if (two == 1)
a = "十";
if (two == 2)
a = "廿";
if (two == 3)
a = "三";
int one = (int) (day % 10);
switch (one) {
case 1:
a += "一";
break;
case 2:
a += "二";
break;
case 3:
a += "三";
break;
case 4:
a += "四";
break;
case 5:
a += "五";
break;
case 6:
a += "六";
break;
case 7:
a += "七";
break;
case 8:
a += "八";
break;
case 9:
a += "九";
break;
}
return a;
}

public static String today() {
Calendar today = Calendar.getInstance(Locale.SIMPLIFIED_CHINESE);
int year = today.get(Calendar.YEAR);
int month = today.get(Calendar.MONTH) + 1;
int date = today.get(Calendar.DATE);
long[] l = calElement(year, month, date);
StringBuffer sToday = new StringBuffer();
try {
sToday.append(sdf.format(today.getTime()));
sToday.append(" 农历");
sToday.append(cyclical(year));
sToday.append('(');
sToday.append(AnimalsYear(year));
sToday.append(")年");
sToday.append(nStr1[(int) l[1]]);
sToday.append("月");
sToday.append(getChinaDate((int) (l[2])));
return sToday.toString();
} finally {
sToday = null;
}
}

/**
* 农历日历工具使用演示
*
* @param args
*/
public static void main(String[] args) {
System.out.println(today());
}
}